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Word Problems Point-Slope

Total questions: 6

Worksheet time: 52mins

Name
Class
Date
1.

A climber is on a hike. After 2 hours he is at an altitude of 400 feet. After 6 hours, he is at an altitude of 700 feet.

What is the average rate of change?

What is a point-slope equation for the climber?

a)

200 ; y - 700 = 200(x - 6)

b)

75 ; y - 6 = 75(x - 700)

c)

300 ; y - 700 = 300(x - 6)

d)

75 ; y - 700 = 75(x - 6)

2.

At 0 seconds, Mrs. Taylor was 10 feet off the ground. At 5 seconds, she was 20 feet off the ground. Write two point-slope form equations for the problem.

a)

y - 0 = 2(x - 10)

y - 5 = 2(x - 20)

b)

y - 0 = 5(x - 10)

y - 5 = 5(x- 20)

c)

y - 10 = 2(x - 0)

y - 20 = 2(x -5)

d)

y - 10 = 6(x - 0)

y - 20 = 6(x - 5)

3.
11. Which of the following is NOT true about the graph of the line
y + 4 = -5(x - 1)
a)
It goes through the point (-4, 1)
b)
It has a slope of -5
c)
The equation is in point-slope form
d)
It goes through the point (4, -1)
4.

Find the rate of change.

Then write the point-slope equation.

a)

-2 minutes per gallon

y - 80 = -2 (x - 10)

b)

-20 minutes per gallon

y - 80 = -20 (x - 10)

c)

-2 gallons per minute

y -80 = -2 (x - 10)

d)

-20 gallons per minute

y - 80 = -20 (x - 10)

5.
Write the equation of the line shown in point slope form.
a)
y - 7 = 3/4 (x - 0)
b)
y - 0 = -3/4 (x - 7)
c)
y + 4 = -3/4 (x + 4)
d)
y - 4 = -3/4 (x - 4)
6.
Violet has an Internet business selling paint sets.  After an initial website fee each week, she makes a profit of $0.75 on each set she sells.  If she sells 8 sets and she makes $2.25; write an equation in point-slope form representing her weekly possible earnings.
a)
y - 2.25 = 0.75(x - 8)
b)
y - 8 = 0.75(x - 2.25)
c)
y - 8 = 2.25(x - 0.75)
d)
y - 0.75 = 2.25(x - 8)